Sukhoi Syb-A … FSW demonstrator !?!

Hmmm … I think I forgot this project … but yesterday I’ve read an article from WAPJ No. 34 regarding the S-37’s development and there was a short note abaout this “single engined FSW demonstrator built by Sukhoi !” 😮 :confused:

Are there any more information – maybe more recent ? – regarding this project … after some Google-ing I only found some very confusing “facts” …:
–some telling it seems to be a FSW fitted Su-17 following the earlier Su-7 FSW (Any PICTURES ?????)
— others think that it was just a rumour because MiG + TsAGI was working on MiG-23 based designs and Sukhoi with FSW-versions of the Su-27 … but ??????

and then this: http://aeroweb.lucia.it/~agretch/RAFAQ/six5th_5.html

“S-37 is by no means the first FSW designed by Sukhoi. At one point Su-9 was fitted with FSW to explore the aerodynamics of the layout. It is not clear which Su-9 was used for the FSW tests, likely a single engine fighter, rather than postwar twin engine Me-262 look alike. Although German FSW influence is tempting, there were by far more time and funds for experimental work in 60s, when few Su-9 aerodynamic testbeds were flown.

Sukhoi’s SYB-A first flew in 1982, more than a year earlier than Grumman X-29 FSW demonstrator. Initially discovered by US intelligence at Saki airfield, close to Syberski in the Black Sea region Sukhoi FSW was codenamed SYB-A, in tradition of indexing Soviet experimental aircraft according to the places these were first seen.

FSW Su-9 and SYB-A are likely to be closely related if not the same aircraft. Moreover, few sources suggested that S-37 in early stages of its development was to be much smaller, single engined attack aircraft, very much like Su-9 and SYB-A. What is interesting, SYB-A was spotted on what appears one of the naval airbases which give additional clues about the genesis of the S-37.”

Any comments, Deino 🙂